1 #ifndef _ASM_IA64_INTRINSICS_H
2 #define _ASM_IA64_INTRINSICS_H
5 * Compiler-dependent intrinsics.
7 * Copyright (C) 2002-2003 Hewlett-Packard Co
8 * David Mosberger-Tang <davidm@hpl.hp.com>
13 /* include compiler specific intrinsics */
14 #include <asm/ia64regs.h>
15 #ifdef __INTEL_COMPILER
16 # include <asm/intel_intrin.h>
18 # include <asm/gcc_intrin.h>
21 #define ia64_set_rr0_to_rr4(val0, val1, val2, val3, val4) \
23 ia64_set_rr(0x0000000000000000UL, (val0)); \
24 ia64_set_rr(0x2000000000000000UL, (val1)); \
25 ia64_set_rr(0x4000000000000000UL, (val2)); \
26 ia64_set_rr(0x6000000000000000UL, (val3)); \
27 ia64_set_rr(0x8000000000000000UL, (val4)); \
31 * Force an unresolved reference if someone tries to use
32 * ia64_fetch_and_add() with a bad value.
34 extern unsigned long __bad_size_for_ia64_fetch_and_add (void);
35 extern unsigned long __bad_increment_for_ia64_fetch_and_add (void);
37 #define IA64_FETCHADD(tmp,v,n,sz,sem) \
41 tmp = ia64_fetchadd4_##sem((unsigned int *) v, n); \
45 tmp = ia64_fetchadd8_##sem((unsigned long *) v, n); \
49 __bad_size_for_ia64_fetch_and_add(); \
53 #define ia64_fetchadd(i,v,sem) \
56 volatile __typeof__(*(v)) *_v = (v); \
57 /* Can't use a switch () here: gcc isn't always smart enough for that... */ \
59 IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v)), sem); \
61 IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem); \
63 IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem); \
65 IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem); \
67 IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem); \
69 IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem); \
71 IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem); \
73 IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem); \
75 _tmp = __bad_increment_for_ia64_fetch_and_add(); \
76 (__typeof__(*(v))) (_tmp); /* return old value */ \
79 #define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (i)) /* return new value */
82 * This function doesn't exist, so you'll get a linker error if
83 * something tries to do an invalid xchg().
85 extern void ia64_xchg_called_with_bad_pointer (void);
87 #define __xchg(x,ptr,size) \
89 unsigned long __xchg_result; \
93 __xchg_result = ia64_xchg1((__u8 *)ptr, x); \
97 __xchg_result = ia64_xchg2((__u16 *)ptr, x); \
101 __xchg_result = ia64_xchg4((__u32 *)ptr, x); \
105 __xchg_result = ia64_xchg8((__u64 *)ptr, x); \
108 ia64_xchg_called_with_bad_pointer(); \
113 #define xchg(ptr,x) \
114 ((__typeof__(*(ptr))) __xchg ((unsigned long) (x), (ptr), sizeof(*(ptr))))
117 * Atomic compare and exchange. Compare OLD with MEM, if identical,
118 * store NEW in MEM. Return the initial value in MEM. Success is
119 * indicated by comparing RETURN with OLD.
122 #define __HAVE_ARCH_CMPXCHG 1
125 * This function doesn't exist, so you'll get a linker error
126 * if something tries to do an invalid cmpxchg().
128 extern long ia64_cmpxchg_called_with_bad_pointer (void);
130 #define ia64_cmpxchg(sem,ptr,old,new,size) \
135 case 1: _o_ = (__u8 ) (long) (old); break; \
136 case 2: _o_ = (__u16) (long) (old); break; \
137 case 4: _o_ = (__u32) (long) (old); break; \
138 case 8: _o_ = (__u64) (long) (old); break; \
143 _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \
147 _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \
151 _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \
155 _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \
159 _r_ = ia64_cmpxchg_called_with_bad_pointer(); \
162 (__typeof__(old)) _r_; \
165 #define cmpxchg_acq(ptr, o, n) \
166 ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
167 #define cmpxchg_rel(ptr, o, n) \
168 ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
170 /* for compatibility with other platforms: */
171 #define cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
172 #define cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
174 #define cmpxchg_local cmpxchg
175 #define cmpxchg64_local cmpxchg64
177 #ifdef CONFIG_IA64_DEBUG_CMPXCHG
178 # define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
179 # define CMPXCHG_BUGCHECK(v) \
181 if (_cmpxchg_bugcheck_count-- <= 0) { \
183 extern int printk(const char *fmt, ...); \
184 ip = (void *) ia64_getreg(_IA64_REG_IP); \
185 printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v)); \
189 #else /* !CONFIG_IA64_DEBUG_CMPXCHG */
190 # define CMPXCHG_BUGCHECK_DECL
191 # define CMPXCHG_BUGCHECK(v)
192 #endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
195 #endif /* _ASM_IA64_INTRINSICS_H */